Infinity Endurance Jacket DARK SHARK JUICY BLUE CAMO The Rab Infinity Jacket is a super lightweight and very warm down jacket. The Rab Infinty jacket is the latest example of how our close relationship with our fabric and down suppliers has enabled us to create an amazing lightweight technical piece. We use Pertex Quantum GL 10D which is the lightest incarnation of this ever popular fabric and we fill this with 30 years of down construction know-how and 210g/7oz (size large) of the best quality